SAMPLING
Samples for the diagnosis of both SARS-CoV and COVID-19 were usually
taken from the upper respiratory tract, either the nasopharynx, nasal
mid turbine (deep nasal swab), the anterior nare or nasopharyngeal wash.
They can also be taken from the lower respiratory tract through
bronchoalveolar leavage, pleural fluid, tracheal aspirate, or lung
biopsy; sputum is also used (Roos, 2003; CDC, 2020; Corman et al.,
2020). For epidemiological purposes, the peak detection for SARS-CoV
usually occur at the first 2 week for respiratory samples, rectal swab
or stool can be taken 2-3 weeks and at week 4, urine can be collected.
The rectal swab, sputum and stool can be collected in transport media
whereas urine and blood samples in sterrile containers (Chan et al.,
2004).